diff --git a/Appraisals b/Appraisals
index 350af7d..1394000 100644
--- a/Appraisals
+++ b/Appraisals
@@ -29,3 +29,7 @@ end
 appraise "rails-4.2.0" do
   gem "rails", "4.2.0"
 end
+
+appraise "rails-4.2.1" do
+  gem "rails", "4.2.1"
+end
diff --git a/washout_builder.gemspec b/washout_builder.gemspec
index f704c65..3a4dff6 100644
--- a/washout_builder.gemspec
+++ b/washout_builder.gemspec
@@ -37,7 +37,14 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'capybara', '~> 2.2', '>= 2.2.1'
   s.add_development_dependency 'selenium-webdriver',  '~> 2.41', '>= 2.41.0'
   s.add_development_dependency 'headless','~> 1.0', '>= 1.0.1'
+  
   s.add_development_dependency 'rubocop', '0.29'
   s.add_development_dependency 'phare', '~> 0.6', '>= 0.6'
+  s.add_development_dependency 'yard', '~> 0.8.7', '>= 0.8.7'
+  s.add_development_dependency 'yard-rspec', '~> 0.1', '>= 0.1'
+  s.add_development_dependency 'redcarpet', '~> 3.2.2', '>= 3.2.2'
+  s.add_development_dependency 'github-markup', '~> 1.3.3', '>= 1.3.3'
+  s.add_development_dependency 'inch', '~> 0.5.10'
+  s.add_development_dependency 'guard-inch', '~> 0.1.0'
   s.add_development_dependency "scss-lint", '~> 0.34', '>= 0.34'
 end